You can't, the "Twittern" (you made a typo) button is covering it.
I don't understand the point of Pltts. The top 20 colours are just ColourLovers top 20 colours. Why not browse ColourLovers that has the exact same stuff, plus much MUCH more?
This works for me with my first gen 15" Retina. This also happened to me at https://optin.stopwatching.us/, and I assumed it was exploiting some kind of bug with fullscreen for an intentional effect. I am using an external 20" older generation Apple display.
Makes sense, but I doubt many of them operate the built-in keyboard with the lid closed :). Ignoring the keyboard input in this case would be a cheap "fix".
Palm devices used a stylus and had text input via a special language at the bottom of the screen. How is this remotely related to the Samsung/Apple patent issues at hand?